/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.ranger.plugin.audit;

import org.apache.ranger.audit.model.AuthzAuditEvent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.ArrayList;
import java.util.Collection;

public class RangerMultiResourceAuditHandler extends RangerDefaultAuditHandler {
    private static final Logger LOG = LoggerFactory.getLogger(RangerMultiResourceAuditHandler.class);

    Collection<AuthzAuditEvent> auditEvents = new ArrayList<>();

    public RangerMultiResourceAuditHandler() {
    }

    @Override
    public void logAuthzAudit(AuthzAuditEvent auditEvent) {
        auditEvents.add(auditEvent);
    }

    @Override
    public void logAuthzAudits(Collection<AuthzAuditEvent> auditEvents) {
        this.auditEvents.addAll(auditEvents);
    }

    public void flushAudit() {
        try {
            boolean deniedExists = false;

            // First iterate to see if there are any denied
            for (AuthzAuditEvent auditEvent : auditEvents) {
                if (auditEvent.getAccessResult() == 0) {
                    deniedExists = true;

                    break;
                }
            }

            for (AuthzAuditEvent auditEvent : auditEvents) {
                if (deniedExists && auditEvent.getAccessResult() != 0) {
                    continue;
                }

                super.logAuthzAudit(auditEvent);
            }
        } catch (Throwable t) {
            LOG.error("Error occured while writing audit log... ", t);
        } finally {
            // reset auditEvents once audits are logged
            auditEvents = new ArrayList<>();
        }
    }
}
